Be silent always when you doubt your sense.
- Alexander Pope

Many attempts to communicate are nullified by saying too much.
- Robert Greenleaf

One of the lessons of history is that nothing is often a good thing to do and always a clever thing to say.
- Will Durant

Look out how you use proud words.When you let proud words go, it is not easy to call them back.They wear long boots, hard boots.
- Carl Sandburg